This Community has several solutions where no artwork shows but my problem is slightly different. When playing music, the album artwork shows up. However, there are no album thumbnails when viewing the Library index. The artwork is definitely there, in the right place and in the right format 'cus it shows when I select the album. But when I'm browsing the list of albums, for example, just grey boxes instead of album thumbnails. Incidentally, I don't use iTunes so any solution that relies on iTunes is no good for me - sorry.